Numerical investigation on the natural convection effects in the melting process of PCM in a finned container using lattice Boltzmann method

Taghilou, Mohammad; Talati, Faramarz

doi:10.1016/j.ijrefrig.2016.07.002

Cited by 22 publications

(5 citation statements)

References 29 publications

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“…The Lattice Boltzmann method (LBM) is a mesoscale discrete model that has become an increasingly popular tool for simulating fluid flows with and without heat transfers [15][16][17][18][19][20]. It consists of simulating the statistical behavior of a set of particles on a lattice with finite velocities.…”

Section: Thermal Lattice Boltzmann Model (Tlbm)mentioning

confidence: 99%

“…Thereby, the main aim targeted here is to provide an improved model that accounts for supercooling, convection and the modified enthalpy-temperature curve. To carry out this work, we consider the thermal lattice Boltzmann method (TLBM) [15][16][17][18][19][20] based on a partial bounce-back (PBB) approach [21][22][23] supplemented with an enthalpy-based model. This enhanced model provides a more accurate simulation of phase-change materials, can better predict the solidification and melting processes, and thus match the experimental results.…”

Section: Introductionmentioning

confidence: 99%

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Experimental and numerical characterization of an impure phase change material using a thermal lattice Boltzmann method

Yehya

Naji

Zalewski

2019

Applied Thermal Engineering

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Of the phase change materials (PCMs) that regulate ambient temperature while reducing energy consumption, Octadecane is a good candidate because of its transparency properties and its adequate melting temperature. This study aims to characterize, through an approach combining numerical simulation and experiment, the behavior and thermo-physical properties of n-Octadecane. The approach takes into consideration the natural convection and the use of PCM's experimentally-obtained enthalpy-temperature curve that includes the supercooling and soluble impurities effects. The model uses the thermal lattice Boltzmann method based both on a partial bounce-back and an enthalpy formulation while including the experimental relationships. The numerical and experimental results exhibit good agreement. The approach adopted allows to highlight the behavior of the PCM to better characterize its thermo-physical properties.

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Section: Thermal Lattice Boltzmann Model (Tlbm)mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Experimental and numerical characterization of an impure phase change material using a thermal lattice Boltzmann method

Yehya

Naji

Zalewski

2019

Applied Thermal Engineering

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“…Using fins is another compensation method to improve the LHTS performance. Taghilou and Talati [28,29] numerically focused on the charging and discharging of PCM inside a rectangular finned container. A methodology based on the lattice Boltzmann method (LBM) was used to illustrate the role of fins in these procedures.…”

Section: Introductionmentioning

confidence: 99%

Modeling of Multi-Layer Phase Change Material in a Triplex Tube under Various Thermal Boundary Conditions

2022

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Nowadays, limited energy resources face ever-growing demands of the modern world. One engineering approach to mitigate this problem which has received considerable attention in recent years is using latent heat thermal storage (LHTS) systems, a significant opportunity which is provided by phase change materials (PCMs). In the present study, a numerical investigation was devoted to estimate the simultaneous freezing and melting processes of a double-layer PCM in terms of heat transfer and fluid flow phenomena. A double-pipe cylindrical channel with two compartments, A and B, was considered for locating two PCMs of RT28 and RT35 in various arrangements. The inner and outer walls were exposed to both hot and cold heat transfer fluids (HHTFs and CHTFs, respectively) beginning with solid or liquid initial state, which led to solid–liquid phase change process through PCMs. The numerical simulation was handled by a two-dimensional finite volume method (FVM) with a fixed Rayleigh number of 106 in which conduction and convection heat transfer mechanisms are taken into account. The effects of employing double-layer PCM and their arrangements, inner and outer walls’ boundary conditions, and initial statuses of PCMs are discussed, and the details of the compared results are shown in the form of temperature and liquid fraction variations over time.

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“…Although PCMs are used in many industrial applications, the low thermal conductivity of PCMs is a disadvantage for systems with charge and discharge cycles. Some techniques were proposed to overcome this problem, such as inserting the fins in the PCM enclosure [20,21], carbon nanotubes in the PCM [22], and using the multilayer PCMs [23,24]. Furthermore, microencapsulated phase change materials (MPCMs) are used for thermal energy storage [25].…”

Section: Introductionmentioning

confidence: 99%

Effect of Inclined Magnetic Field on the Entropy Generation in an Annulus Filled with NEPCM Suspension

Seyyedi

Sharifpur

2021

Mathematical Problems in Engineering

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The encapsulation technique of phase change materials in the nanodimension is an innovative approach to improve the heat transfer capability and solve the issues of corrosion during the melting process. This new type of nanoparticle is suspended in base fluids call NEPCMs, nanoencapsulated phase change materials. The goal of this work is to analyze the impacts of pertinent parameters on the free convection and entropy generation in an elliptical-shaped enclosure filled with NEPCMs by considering the effect of an inclined magnetic field. To reach the goal, the governing equations (energy, momentum, and mass conservation) are solved numerically by CVFEM. Currently, to overcome the low heat transfer problem of phase change material, the NEPCM suspension is used for industrial applications. Validation of results shows that they are acceptable. The results reveal that the values of N u ave descend with ascending Ha while N gen has a maximum at Ha = 16 . Also, the value of N T , MF increases with ascending Ha . The values of N u ave and N gen depend on nondimensional fusion temperature where good performance is seen in the range of 0.35 < θ f < 0.6 . Also, Nu ave increases 19.9% and ECOP increases 28.8% whereas N gen descends 6.9% when ϕ ascends from 0 to 0.06 at θ f = 0.5 . Nu ave decreases 4.95% while N gen increases by 8.65% when Ste increases from 0.2 to 0.7 at θ f = 0.35 .

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Numerical investigation on the natural convection effects in the melting process of PCM in a finned container using lattice Boltzmann method

Cited by 22 publications

References 29 publications

Experimental and numerical characterization of an impure phase change material using a thermal lattice Boltzmann method

Experimental and numerical characterization of an impure phase change material using a thermal lattice Boltzmann method

Modeling of Multi-Layer Phase Change Material in a Triplex Tube under Various Thermal Boundary Conditions

Effect of Inclined Magnetic Field on the Entropy Generation in an Annulus Filled with NEPCM Suspension

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